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Periplasmic electron carriers and photo-induced electron transfer in the photosynthetic bacterium Ectothiorhodospira sp. |
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| Authors: | Buche André Picorel Rafael Moulis Jean-Marc Verméglio André |
| Institution: | (1) Plant Nutrition, Estacion Experimental Aula Dei, CSIC, Apartado 202, Zaragoza, 50080, Spain; Author for correspondence (e-mail;(2) Plant Nutrition, Estacion Experimental Aula Dei, CSIC, Apartado 202, Zaragoza, 50080, Spain;(3) Laboratoire Métalloprotéines, C.E.A./Grenoble-DSV-DBMS, 17 ave des Martyrs, 38054 Grenoble Cedex 9, France;(4) Laboratoire de Bioénergétique Cellulaire, C.E.A./Cadarache-DSV-DEVM, 13108 Saint-Paul-lez-Durance Cedex, France |
| Abstract: | A detailed analysis of the periplasmic electron carriers of the photosynthetic bacterium Ectothiorhodospira sp. has been performed. Two low mid-point redox potential electron carriers, cytochrome c′ and cytochrome c, are detected. A high potential iron–sulfur protein is the only high mid-point redox potential electron transfer component present in the periplasm. Analysis of light-induced absorption changes shows that this high potential iron–sulfur protein acts in vivo as efficient electron donor to the photo-oxidized high potential heme of the Ectothiorhodospira sp. reaction center. This revised version was published online in June 2006 with corrections to the Cover Date. |
| Keywords: | Ectothiorhodospira sp electron tranfer HiPIP photosynthetic bacteria |
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